Cutter-head



(No Model.)

W. H. DOANE.

I CUTTER HEAD. v No. 337,487. Patented Mar. 9; 1886.

NITED STATES PATENT OFFICE.

WILLIAM H. DOANE, OF CINCINNATI, OHIO.

CUTTER-HEAD.

SPECIFICATION forming part of Letters Patent No. 337,487, dated March 9,1886.

Application filed January 18, 1886. Serial No. 188,978. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM H. DOANE, a citizen of the United States,residing at Oincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Cutter-Heads; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to that type of cutterheads which are provided withtwo or more eccentrically-disposed bits having the form of notchedcircular disks, and being secured to the head by bolts which passthrough their centers, on which bolts they may be turned for adjustmentas they wear away.

The object of my invention is to give an oblique set to such bits, forthe purpose of clearance, by the fastening-bolts. To this end Iconstruct the bolt with a double-faced collar, making that face whichclamps against the head oblique to the other face from which the shankfor the bit projects at right angles, the bit-socket bottom of the headclamped by the oblique face of the collar being dressed so as to form aplane at right angles to the axis of the head, as usual.

In order that my invention may be clearly understood, I have illustratedin the annexed drawings, and will proceed to describe, a cutter-headdesigned for cutting tongues on the edges of boards, and embodyng myinvention.

Figure 1 represents a side elevation of such cutter-head partlysectionized in the axial plane of one of the bits. Fig. 2 represents aperspective of a bit-fastening bolt.

The same letters of reference indicate identical parts in all thefigures.

The head A is of ordinary constructiomhav' ing the usual alternatingflat-bottomed bitsockets. By flat-bottomed I mean that the planes of thebottoms of these sockets are at right angles to the axis of the head.Each bit B is centrally mounted on the shank c and seated against oneface of the collar 0 of a double-shanked bolt, the shank c of whichpasses through a holein the socket-bottom and is screw-threaded toreceive a nut, 0", between which and the collar 0 the web of the head isfirmly clamped. The shank 0 projects at right angles from the adjoiningface of collar 0, and is also screw-threaded to receive a nut, c, bywhich the bolt is firmly clamped against the collar.

In order to throw the bit into a slightly-oblique position withreference to the axis of the head, so as to provide for clearance, theface of the collar from which the bolt-shank a projects, and whichclamps against the fiat bottom of the bit-socket, is made oblique to theother face. The effect of this obliquity of the head-clamping face ofthe collar is to incline the bolt-shank 0 when the bolt is applied tothe head. The bolt-shank'c is shown as pro-' jecting at right anglesfrom the adjoining or oblique face of collar c'; but that is notmaterial. In order that the bit-fastening bolt may not turn on the head,(its turning would alter the set of the bit,) shank c has a projection,c, which engages a notch in the bottom of the bit-socket, as clearlyshown in Fig. 1.

Adjustability of the set of the bit may be provided for by a series ofsuch notches in the bit-socket bottom.

I do not limit myself to any particular form of head. Vhether it hasbit-sockets or not will depend upon the use for which it is designed.

The gist of my invention consists in mounting the bit upon a collaredbolt the head-clamping face of whose collar is oblique to the faceagainst which the bit is clamped.

I claim as my invention The combination, substantially as before setforth, of the head, the circular bit, and the bolt having a double-facedcollar the headclamping face of which is oblique to its other face, fromwhich the shank for the bit projects at right angles.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM H. DOANE.

Witnesses:

A. M. NEWKIRK, A. N. SPENCER.

